1st Grade Task: Baseball Cards Collection

Learning objectives:

Students will:

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.

Essential and guiding questions:

What is the problem asking you to find?

What do the cubes (or other manipulatives) represent?

What type of number sentence could describe this situation and how do you know?

How do you know who has the most?

How could you represent this problem on a number line?

How could I rearrange the cubes in groups of tens and how would that help me know the total?

What if John receives one more baseball card? Who will have more and how do you know?

John started with 8 cards and Isaac started with 7 cards. How is it

possible that Isaac ends with more cards?

How many more cards would each boy need to collect 20 cards each?

Blooms taxonomy level:

Applying

Extension suggestions:

How many more cards will each boy need to have 25 cards in his collection?

If each boy gave 6 cards to a friend, how many cards would each boy have?

Originator: